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satela [25.4K]
3 years ago
12

Whom and what finally proved Wegener's theory?

Biology
1 answer:
Gemiola [76]3 years ago
8 0
William Hess proves Alfred Wagner’s theory
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Choose all the answers that apply.
lutik1710 [3]

Answer: Injecting antibodies into the body.

Explanation: When you a vaccine, you are receiving a small dosage of the vaccine, causing you to have antibodies to protect your immune system if you were to get the virus.

4 0
3 years ago
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Whether during mitosis or meiosis, sister chromatids are held together by proteins referred to as cohesions. Such molecules must
scoundrel [369]

Answer:

1. They must be removed before sister chromatids or homologous chromosomes can separate

Explanation:

During the S-phase of the cell cycle, not only does DNA have to be replicated, but also newly synthesized DNA molecules have to be connected with each other. This replicated DNA (sister chromatids) remain physically connected with each other from S phase until metaphase. This physical connection is called Sister chromatids cohesion.

Sister chromatid cohesion depends on COHESIN, a tripartite protein complex that forms a ring structure to hold sister chromatids together during mitosis and meiosis. Cohesin regulates the separation of sister chromatids during cell division, either mitosis or meiosis. This sister chromatid cohesion is essential for the biorientation of chromosomes on the mitotic or meiotic metaphase spindle, and is thus an essential prerequisite for chromosome segregation. Without the cohesion, sister chromatids would not be segregated symmetrically between the forming daughter cells, resulting in aneuploidy.

Cohesion is established during S-phase of DNA replication, and the cohesins hold the sister chromatid together after DNA replication until anaphase when the removal of cohesin leads to separation of sister chromatids (meiosis II and mitosis) and homologous chromosomes (meiosis I).

8 0
3 years ago
If B represents brown b represents black, what color fur would you see in a rabbit whose genotype is Bb?
Westkost [7]

Answer:

its would be brown because it is more dominant

6 0
3 years ago
Most algae get energy from ____
natali 33 [55]

Some algae have chloroplasts and chlorophyll and obtain their energy through photosynthesis while some algae like euglena are both heterotrophic (decompose dead organic matter) and autotrophic (use photosynthesis) and can also obtain energy likewise.


3 0
3 years ago
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What 2 organs of the body interact to regulate blood glucose levels?
Marizza181 [45]

Answer:

the pancreas and liver i think

8 0
3 years ago
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